Long-term interference at the semantic level: Evidence from blocked-cyclic picture matching

Area of Science:

• Cognitive Psychology
• Neuroscience
• Psycholinguistics

Background:

• Processing semantically related information can lead to interference in cognitive tasks.
• Understanding the source and duration of this interference is crucial for cognitive models.

Purpose of the Study:

• To identify the locus and mechanism of semantic interference during meaning retrieval from words and pictures.
• To differentiate between interference occurring at the semantic representation access stage versus later processing stages.

Main Methods:

• Participants matched probe stimuli (words or pictures) to associated target pictures amidst unrelated distractors.
• Semantic relatedness between probes and targets was manipulated (related vs. unrelated).
• Interference locus was tested by varying probe presentation modality (word vs. picture); mechanism was tested by manipulating intervening trials and presentation cycles.

Main Results:

• Semantic interference effects were observed regardless of probe presentation modality (word or picture), indicating a common semantic locus.
• Interference effects were long-lasting, persisting across presentation cycles and surviving intervening trials.
• A smaller interference effect with zero intervening trials suggested short-lived facilitation counteracting long-lived interference.

Conclusions:

• Semantic interference in meaning retrieval occurs at the level of accessing semantic representations.
• The interference mechanism involves both long-lasting changes in semantic network connections (incremental learning) and short-lived residual activation leading to facilitation.